Wrench



(No Model.)

J.A.'HUNT. WRENCH.

No. 538,166. Patented Apr.z23, 1895.

@Lw/bumsen y NTTTD STATns PATENT Trice.

JONATHAN A. HUNT, OF WESTBOROUGH, MASSACHUSETTS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 538,166, dated April 23, 1895.

Application filed August 24,1894. Serial No. 521,146. (No model.)

To a/ZZ whom t may concern.-

Be it known that I, JONATHAN A. HUNT', a citizen of the United States, residing at Westborough, in the county of Worcester and State of Massachusetts', have invented certain new and useful Improvements in'Wrenches; and I do hereby declare that the followingis a full, clear, and exact description thereof, which, in connection with the drawings making a part of this specification, will enable others skilled in the art to which my invention belongs to make and use the same.

My invention relates to wrenches, and particularly to that class of wrenches in which there is a fixed or stationary jaw, formed integral with the handle, and a movable jaw adapted to slide on the 'handle portion, and operated by a worm or nut, engaging teeth on the handle portion, and the object of my invention is to improve upon the construction of wrenches of the class above referred to, and more particularly to combine with the Wrench, a clamping or cam lever, to force the jaws toward each other, after they have been moved as far as possible by turning the worm or nut, to cause them to clamp and hold more tightly the article placed between them.

My invention consists in certain novel features of construction of a wrench, as will be hereinafter fully. described, and the nature thereof indicated by the claims.

Referring to the drawingsz-Figure 1 is a side view of my wrench, with the clamping or cam lever moved down against the handle. Fig. 2 is a front edge view of the wrench shown in Fig. 1, looking in the direction of arrow a, same figure. Fig. 3 is a partial sectional view of the wrench, with the clamping lever moved out from the handle.

In the accompanying drawings, the handle 1 consists preferably of a flat bar, having at one end the fixed jaw 2, formed integral therewith, and the other end preferably rounded, and channeledon its fiat surface, as shown at 3, Figs. l and 3, and the front edge of the handle 1 provided with teeth 4.

A sleeve 5 is mounted on the handle bar l, and is adapted to, slide thereon, and has the movable jaw 6 formed integral therewith. The rear edge of said sleeve is preferably recessed or cut out, as shown at 5', to reduce the weight, and the front edge is also recessed or cut out, as shown at 5, to receive the worm or nut 7, which meshes with the teeth 4, on the handle bar 1, and is mounted and turns on a pin or screw 8, which extends througha hole in the lug or projection 5', at the lower part of the sleeve 5, with its upper end screwed into a screw threaded hole 9, in the sleeve, above the recessed portion 5.

A loose washer 10 is preferably used in connection with the worm 7, as shown, to furnish a larger bearing surface for the cam lever to Work on, than the top of said Worm furnishes, but said washer may be dispensed with, and the top of said wormused as a bearing surface.

In operating the wrench above described, the movable jaw 6 is moved as far as possible toward the stationary jaw 2, by turning the worm 7, which engages the teeth 4, to clamp the article between said jaws, but in order to clamp and hold the article still more tightly, I combine with said wrench a clamping or cam lever 1l, which is preferably channeled upon its inner surface to extend over the rear edge of the handle bar 1, and is forked or bifurcated at its upper end, to straddle or eX- tend over the sleeve 5, and curved inwardly, and pivoted eccentrically, or off its center, on the front portion of the sleeve 5, at a point above the worm 7, by apin 12, in such a manner, that after the article is clamped between the jaws, as above described, the clamping lever 11 being rst moved out from the han die bar, as shown in Fig. 3, the'drawing down, or moving inwardly of the lever 1l, toward the handle bar 1, will cause the lower curved portion 11 of the pivoted end of the lever 11 to engage the washer 10, in case a washer is used, or the upper end of the worm 7, in case a washer is not used, which washer, and the worm 7 engaging the rack teeth 4, remain stationary, and force the sleeve 5 and the movable jaw 6 upwardly, toward the stationary jaw 2, as shown in Fig. 1, to clamp more tightly the article between the jaws.

By combining with the wrench, the clamping lever 11, as above described, I am enabled to grip and hold very tightly any article between the jaws. The wrench may also be used as an ordinary wrench, without using the clamping lever, which will remain in the IOO position shown in Fig. 1, and form a part of the handle bar of the wrench, and said clamping lever may be detached from the wrench, if preferred.

The advantages of my improved construction of a wrench, will be readily appreciated by those skilled in the art.

I provide a light and strong wrench, having a clamping or cam lever combined therewith, for compressing the jaws more tightly, upon the article between them, than can possibly be done by means of the worm 7.

It will be understood that the details of construction of my wrench, may be varied somewhat if desired.

Having thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

l. In a wrench, the combination with the handle bar, provided with teeth on one edge and having the stationary jaw at one end thereof, and a sleeve, mounted and adapted to slide on said bar and having the movable jaw thereon, and carrying a worm or nut to engage the teeth on the handle bar, to move said sleeve thereon, of a cam lever, adapted to operate to move one jaw toward the other, substantially as set forth.

2. In a wrench, the combination with the handle bar, provided with teeth on its front edge, and having the stationary jaw atene end thereof, of a sleeve mounted and adapted to slide on said bar, and having the movable jaw thereon, and carrying a worm or nut to engage the teeth on the handle bar, to move said sleeve thereon, and said worm, and a pin or screw for securing the same to said sleeve, substantially as shown and described.

3. In a wrench, the combination with the handle bar, provided with teeth on its front edge, and having the stationary jaw at one end thereof, and a sleeve mounted and adapted to slide on said bar, and having the movable jaw thereon, and carrying a worm or nut to engage the teeth on the handle bar, to move said sleeve thereon, and said Worm, and a pin or screw for securing the same to said sleeve, of a cam lever bifurcated at its upper end, to straddle or extend over said sleeve, and pivoted on said sleeve, and adapted to be moved away from and toward the handle bar, and to operate to move the sleeve and movable jaw toward the stationary jaw, for the purpose stated, substantially as set forth.

4. In a wrench, the combination with the handle, consisting of a flat bar with the stationary jaw at one end thereof, and the other end rounded and channeled on its fiat surface, and the front edge of said bar provided with rack teeth, and asleeve mounted and adapted to slide on said bar, and having the movable jaw thereon, said sleeve having a recessed or cut out portion at its rear edge, and a recessed or cut out portion at its front edge, in which latter recess extends a worm or nut, which engages the teeth on the handle bar, and said worm or nut, and a washer, and a pin or screw secured to the sleeve for retaining said worm and washer in place, of a cam lever, bifurcated at its upper end, to straddle or extend over the sleeve carrying the movable jaw, and pivoted on said sleeve, and adapted to engage a washer on the worm or nut, or the worm itself, to move said sleeve and movable jaw toward the stationary jaw, for the purpose stated, substantially as set forth. l

J. A. HUNT.

VitneSses:

J. C. DEWEY, MARY J. GALvIN. 

